ORA-05799
row does not exist at pluggable database GUID 'string', instance ID 'string', chain ID 'string', sequence number 'string' in table string.string for computing previous row hash
Cause
An attempt was made to get bytes for row hash for a table row sequence, for which previous row is already deleted. bytes for row hash can not be generated as previous row hash can not be computed.
Action
No Action required.